netdev - Re: [PATCH 0/2] Change struct page layout for page

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Date:   Tue, 20 Apr 2021 14:03:18 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>, brouer@...hat.com
Cc:     arnd@...nel.org, grygorii.strashko@...com, netdev@...r.kernel.org,
        ilias.apalodimas@...aro.org, linux-kernel@...r.kernel.org,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-mips@...r.kernel.org, mhocko@...nel.org, linux-mm@...ck.org,
        mgorman@...e.de, mcroce@...ux.microsoft.com,
        linux-snps-arc@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
        hch@....de, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/2] Change struct page layout for page_pool

"Matthew Wilcox (Oracle)" <willy@...radead.org> writes:
> The first patch here fixes two bugs on ppc32, and mips32.  It fixes one
> bug on arc and arm32 (in certain configurations).  It probably makes
> sense to get it in ASAP through the networking tree.  I'd like to see
> testing on those four architectures if possible?

Sorry I don't have easy access to any hardware that fits the bill. At
some point I'll be able to go to the office and setup a machine that (I
think) can test these paths, but I don't have an ETA on that.

You and others seem to have done lots of analysis on this though, so I
think you should merge the fixes without waiting on ppc32 testing.

cheers


>
> The second patch enables new functionality.  It is much less urgent.
> I'd really like to see Mel & Michal's thoughts on it.
>
> I have only compile-tested these patches.
>
> Matthew Wilcox (Oracle) (2):
>   mm: Fix struct page layout on 32-bit systems
>   mm: Indicate pfmemalloc pages in compound_head
>
>  include/linux/mm.h       | 12 +++++++-----
>  include/linux/mm_types.h |  9 ++++-----
>  include/net/page_pool.h  | 12 +++++++++++-
>  net/core/page_pool.c     | 12 +++++++-----
>  4 files changed, 29 insertions(+), 16 deletions(-)
>
> -- 
> 2.30.2